Script to Verify PySimpleGUI4 Installation Doesn't Seem to Work as Expected

[mehsab13]

I've been using PySimpleGUI4 on Windows 11 since last September with no problems -- mainly using PopUps to browse for files and get other user inputs. Now I'm having problems using the Output and Multiline elements to display STDOUT data with Print statements. While these elements initially display properly, at the first read event, they disappear from the window. I tried running the script to verify my PySimpleGUI4 installation and it doesn't seem to run as expected. It displays the main window with a text field, but when I type something and then enter, nothing happens. What is supposed to happen? How can I find out if something is wrong with my installation?

Thanks,
Bruce Boyd
St. Louis, Missouri USA

[mehsab13]

I neglected to mention that I get a code error on the window.update statement. The code executes without errors, but results in the behavior described above. I also get similar errors on window.read statements in my own code.

Bruce